MR. JOHN CORNELIUS PENNER
NPI 1356845341
Internal Medicine in Santa Cruz, CA
NPI Status: Active since March 22, 2018
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Male
- Internal Medicine
About JOHN PENNER
This page provides the complete NPI Profile along with additional information for John Penner, an internist established in Santa Cruz, California with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1356845341 assigned on March 2018. The practitioner's primary taxonomy code is 207R00000X with license number A167392 (CA). The provider is registered as an individual and his NPI record was last updated August 2025.
- NPI
- 1356845341
- Provider Name
- MR. JOHN CORNELIUS PENNER
- Other Name
- MR. JACK CORNELIUS PENNER
- Other Name Type
- Other Name (5)
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 609 CAYUGA ST SANTA CRUZ, CA 95062
- Location Phone
- (408) 204-6990
- Mailing Address
- 609 CAYUGA ST SANTA CRUZ, CA 95062
- Mailing Phone
- (408) 204-6990
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-22-2018
- Last Update Date
- 08-21-2025
- Code Navigator
An internist like John Penner is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine
- Taxonomy Code
- 207R00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- A167392
- License State
- CA
- Taxonomy Description
- A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program |
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 3 | 5 | 6 | 8 | 4 | 5 | 3 | 4 | 1 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 3 | 10 | 6 | 16 | 4 | 10 | 3 | 8 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 3 + 1 + 0 + 6 + 1 + 6 + 4 + 1 + 0 + 3 + 8 + 24 = 59 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 60 - 59 = 1 | 1 | ||||||||
The NPI number 1356845341 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1356845341, enumerated in the NPI registry as an "individual" on March 22, 2018
The provider is located at 609 Cayuga St Santa Cruz, Ca 95062 and the phone number is (408) 204-6990
The provider's speciality is Internal Medicine with taxonomy code 207R00000X
This NPI record was last updated on March 22, 2018. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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